Local Calling Guide

Area code/prefix search

Search area code/prefix (NPA/NXX)
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NPA: 972 [Rate centres in NPA 972] [Dial plan for NPA 972]

NXX: 637

NPA-NXX BLOCK Rate Centre Region Switch OCN LATA LIR Eff date Disc date
972-637 A Cedar Hill TX DLLFTXFQDS1  7516 LEVEL 3 TELECOM OF TEXAS, LLC 552      
972-637 0 Cedar Hill TX DLLFTXFQDS1  7516 LEVEL 3 TELECOM OF TEXAS, LLC 552      
972-637 1 Cedar Hill TX DLLSTXHWDS0  7087 ICG CHOICE COM, L.P. - TX 552   2007-07-13   
972-637 2 Cedar Hill TX   508J CENTURYLINK COMMUNICATIONS LLC 552   2014-05-14   
972-637 3 Cedar Hill TX RCSNTXHVBMD  516C AT&T CORP. 552   2006-06-30   
972-637 4 Cedar Hill TX RCSNTXHVBMD  516C AT&T CORP. 552   2013-11-11   
972-637 5 Cedar Hill TX DLLFTXFQDS1  7516 LEVEL 3 TELECOM OF TEXAS, LLC 552      
972-637 6 Cedar Hill TX DLLSTXJFPS1  7229 MCIMETRO ACCESS TRANSMISSION SERVICES LLC 552   2003-07-16   
972-637 7 Cedar Hill TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2011-11-26   
972-637 8 Cedar Hill TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   
972-637 9 Cedar Hill TX DLLSTXALDS4  903C ONVOY, LLC - TX 552   2013-12-06   

Last updated: Tue, 04 May 2021 15:04:27 UTC

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